The inner and outer surfaces of a porous hollow fiber polysulfone support are compared as substrates for the synthesis of polyamide thin‐film composite (TFC) membranes by interfacial polymerization. While both surfaces have pores common of microfiltration membranes, the inner surface has a larger pore diameter than the outer surface (2,700 nm compared to 950 nm). The inner TFC membrane showed higher water nanofiltration permeance than the outer (2.20 ± 0.17 compared to 0.13 ± 0.03 L m⁻² hr⁻¹ bar⁻¹). This was due to the influence of the porosity and roughness, which were different on both support surfaces. These membranes are interesting because they were synthesized in a hollow fiber support with a high membrane area per volume unit (~6,900 m²/m³) and the substrate used was commercial, which means that the TFC membrane obtained is suitable for industrial application. A mathematical simulation of the nanofiltration run with COMSOL Multiphysics 5.3 software confirmed the experimental trends observed.

中文翻译：

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聚砜中空纤维内表面或外表面的纳滤薄膜复合膜

比较了多孔中空纤维聚砜载体的内表面和外表面作为通过界面聚合合成聚酰胺薄膜复合材料（TFC）膜的基质。虽然两个表面都具有微滤膜共有的孔，但内表面的孔径比外表面大（2,700 nm比950 nm）。内部TFC膜显示出比外部更高的水纳滤渗透性（2.20±0.17与0.13±0.03 L m ^-2 hr ^-1 bar ^-1）。这是由于孔隙率和粗糙度的影响，它们在两个支撑面上都不同。这些膜很有趣，因为它们是在中空纤维载体中合成的，每单位体积的膜面积大（〜6,900 m ²/ m ³），并且所用基材是商业的，这意味着获得的TFC膜适用于工业应用。使用COMSOL Multiphysics 5.3软件进行的纳滤的数学模拟证实了观察到的实验趋势。